diff --git a/src/day1.rs b/src/day01.rs
similarity index 100%
rename from src/day1.rs
rename to src/day01.rs
diff --git a/src/day2.rs b/src/day02.rs
similarity index 100%
rename from src/day2.rs
rename to src/day02.rs
diff --git a/src/day3.rs b/src/day03.rs
similarity index 100%
rename from src/day3.rs
rename to src/day03.rs
diff --git a/src/day4.rs b/src/day04.rs
similarity index 100%
rename from src/day4.rs
rename to src/day04.rs
diff --git a/src/day5.rs b/src/day05.rs
similarity index 100%
rename from src/day5.rs
rename to src/day05.rs
diff --git a/src/day6.rs b/src/day06.rs
similarity index 100%
rename from src/day6.rs
rename to src/day06.rs
diff --git a/src/day7.rs b/src/day07.rs
similarity index 100%
rename from src/day7.rs
rename to src/day07.rs
diff --git a/src/day8.rs b/src/day08.rs
similarity index 100%
rename from src/day8.rs
rename to src/day08.rs
diff --git a/src/day9.rs b/src/day09.rs
similarity index 100%
rename from src/day9.rs
rename to src/day09.rs
diff --git a/src/main.rs b/src/main.rs
index 9fd316e..fcf2c16 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,15 +1,14 @@
 #![allow(dead_code)]
 
-mod day1;
-mod day2;
-mod day3;
-mod day4;
-mod day5;
-mod day6;
-mod day7;
-mod day8;
-mod day9;
+mod day01;
+mod day02;
+mod day03;
+mod day05;
+mod day06;
+mod day07;
+mod day08;
+mod day09;
 
 fn main() {
-    day9::day9();
+    day09::day9();
 }